{"id":"CVE-2012-3566","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-3566","generatedAt":"2026-10-27T23:08:15.917Z","title":"Opera before 12.00 Beta allows user-assisted remote attackers to cause a denial of service (application hang) via JavaScript code that changes a form before submission.","description":"Opera before 12.00 Beta allows user-assisted remote attackers to cause a denial of service (application hang) via JavaScript code that changes a form before submission.","published":"2012-06-14T19:55:02.000Z","lastModified":"2026-06-16T23:43:29.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P"},"cwe":[],"affected":["opera/opera browser"],"epss":{"score":0.0106,"percentile":0.64306,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.06%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://www.opera.com/docs/changelogs/windows/1200b/","source":"cve@mitre.org"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/76361","source":"cve@mitre.org"},{"url":"http://www.opera.com/docs/changelogs/windows/1200b/","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/76361","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-3566","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}